Heat-recuperating mask



FIG. 1 is a perspective view of a heat-recuperating mask showing our newdesign in working position, the broken line showing of the head is forillustrative purposes only and forms no part of the claimed design;

FIG. 2 is a perspective view of a heat-recuperating mask while in foldedposition;

FIG. 3 is a top plan view thereof in open position;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view of thereof, the right sideelevational view being identical thereto;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof while in working position;and,

FIG. 8 is a rear elevational view thereof while in folded position.

The ornamental design for a heat-recuperating mask, as shown anddescribed.